Apogee Instruments MQ-620 Extended Range Photon Flux Density (PFD) Meter for LEDs, 340 to 1040 nm Spectral Read Range.

It works fine very well thank you

They imply it measure UV bands that prevent insects and bacteria , thought these require UVC which is <280nm. UVB is most beneficial for flowering and that is a range of 280-315nm. And UVA which is best during vegetative growth is 315-400nm. So it will barelyyyy measure any UV at all actually. Tricky marketing tactics. But still the best on the market, hopefully they can further increase the range of measurement in a newer model!

Apogee quality quantum sensor delivers extended range readings of PAR vs cheap lux meters. This is what you need to dial in your system. Except nothing less!

Very accurate